British Hymenoptera. 215 



side of the abdomen, with long yellowish grey hairs. 

 Length 5 — 6 mm. 



Hah. Charlwood, Surrey ; Hastings ; Shere. 



I have no doubt this species is generally common, 

 though overlooked, as its ? very much resembles niti- 

 diuscnhis in general appearance ; its much more rugose 

 metathorax, which is clathrately rugose right up to the 

 brow and not only at the base, and its much more 

 deeply punctured mesothorax, will easily distinguish it. 

 The J lacks the long ventral hairs of nitidiusculus. 



16. Halictus suhfasciatus, Nyl. 



Nyl., Not. Sails. Faun. Flor. Fenn., Forh. ii., p. 200 ; 

 Smith, Cat. Brit. Hym., 2nd ed., p. 92 ; <? =^fulvicornis, 

 K. = Icevigatus, Sm., Cat. Brit. Hym., 2nd ed. 



<? very distinct from any of the other black species 

 by its very long antennae, which reach as far as the 3rd 

 abdominal segment. Head and thorax dull, very finely 

 and very closely punctured, sparsely clothed with greyish 

 yellow hairs. Clypeus pale yellow ; face below the 

 antennae clothed with silvery hairs. Antennae beneath 

 bright fulvous. Wings with nervures piceous. Meta- 

 thorax truncate behind, very rugose, the rugosities some- 

 what longitudinal at the base. Abdomen deep black, 

 shining, all the segments distinctly punctured at the 

 base, impunctate at the apex ; 2nd and 3rd with a white 

 basal band, often only visible at the sides. Apical seg- 

 ment with an angulated carina. Beneath with the 

 segments flat, their apical margins nearly straight ; the 

 6th rounded ; (for genitalia see pi. ix., fig. 12). _ Legs 

 with the tarsi, and sometimes the knees and apices of 

 tibiae, pale yellow. 



2 with the head and thorax punctured much as in 

 the S , although perhaps not quite so closely. Meta- 

 thorax sharply truncate posteriorly, its angles promi- 

 nent ; surface shining, longitudinally and somewhat 

 clathrately rugose. Abdomen with the basal segment 

 very shining, in most specimens impunctate, but occa- 

 sionally with a few very shallow fine punctures ; follow- 

 ing segments less shining, clothed with fine short yel- 

 lowish grey hairs ; 2nd and 3rd segments at the base 

 with small lateral white spots, often scarcely observable, 

 as they are easily rubbed off. Apex of each segment 



